50 



COMPARATIVE TABLE OF 



Name. 



A. ipinosa, Ililcs. 



llick- 



son. 



Branching. 



Ccenenchyma. 



In two planes at right angles. 

 One terminal polyp. 



Thin and 

 smooth. 



fairly 



Fan-shaped in one plane, 

 with much anastomosis. 



A. inermis, Hed- 

 lund. 



A. brevispina, Stu- 

 der. 



A. breviflora,Vi 'hite- 

 legge. 



In cue plane, anastomosis 

 present. 



Few on one side, in one plane, 

 flexible. 



Few, alternate in one plane. 



Thin and rough, 

 beset with tuber- 

 culate warts. 



Verruca;. 



Cylindrical, elongated, eome- 

 what expanded at the sum- 

 mit, placed perpendicularly 

 to the stem, and thickly 

 crowded on all sides. 



Of medium thick- , Cylindrical, with scarcely 

 ness, finely granu- visible projecting needles, 

 lar under the lens. eight bands on the body of 

 calvx. 



Spicules in eight rows each, 

 consisting of two sets of 

 converging spicules. Eight 

 apical spines not projecting 

 beyond the operculum. 



Extremely thin, Somewhat constricted at mid- 

 axis visible die ; with spicules arranged 

 through, few] transversely at base, not 

 spicules longitud- , distinctly seriate, peripher- 

 inally arranged. ally at tip, surmounted at 



the apex by a series of long 

 needle-like spicules. 



